Wednesday, July 24, 2013

Goodyear Tire Facts and Notes - Eldora

NASCAR Camping World Truck Series -- Race No. 10 – CarCash Midsummer Classic 
Eldora Speedway (0.5-mile oval) – Rossburg, Ohio
Fast Facts for July 23-24, 2013

Tire: Goodyear Wrangler Dirt Bias Ply

Set limits: 6 sets for the event

Number of Tires: Left-side – 600; Right-side -- 600

Tire Codes: Left-side -- D-3004; Right-side -- D-3006

Tire Circumference: Left-side -- 85.8 in. (2,179 mm); Right-side -- 88.5 in. (2,248 mm)

Technical Inspection Inflation: Left Front -- 20 psi; Left Rear -- 20 psi;
Right Front -- 25 psi; Right Rear -- 25 psi

Minimum Recommended Inflation: Left Front -- 18 psi; Left Rear -- 18 psi;
Right Front -- 22 psi; Right Rear -- 22 psi

Notes: This being the first dirt track race in NASCAR Camping World Truck Series history, this is the first time teams have run either of these two Goodyear tire codes. There are three main differences between this tire set-up and the one that Camping World Truck teams "normally" run on asphalt ovals.  (1) These are bias ply tires, not radials, and are more compliant and able to envelope the irregularities of the dirt surface.  (2) These tires have a block-style tread pattern to help evacuate the dirt, not a "slick" or smooth tread.  (3) This left side tire (D-3004) is significantly shorter to build in more stagger between the left and right side tires. This tire is based on a dirt modified tire already in Goodyear Racing's tire line. The Eldora tire has been widened out to 11 inches (from 10 inches on the dirt modified tire) to give the trucks more grip. Goodyear ran two tests in preparation for this event. The first test, held at Eldora with Tony Stewart, Austin Dillon and Ty Dillon, was with the 10-inch-wide tire. The second test, held at 311 Speedway in Pine Hall, NC with Ty Dillon, was on the the 11-inch-wide tire. As on most NASCAR ovals one mile or less in length, teams will not run inner liners in their tires at Eldora.

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